The best definition for foreign policy is how one country chooses to a) control

the answer is C

interact with other countries

The correct answer is C) interact with other countries.

Foreign policy is the area of a state's policy focused on the international relations and how to strategically interact with other states in order to preserve its own interests and achieve its political, economic, and strategic goals in the international arena. This interaction can be cooperative, like in trade agreements, non-cooperative, and sometimes even hostile, but it always takes place within the framework of international law and in a level of equality among states.

D

Explanation:

It is the only one that makes sense